Piston pump material passing structure and continuous piston pump

Abstract

The utility model discloses a piston pump material passing structure and a continuous piston pump, which are used for promoting material circulation between a first cavity and a second cavity of the piston pump and comprise a first ball valve assembly and a second ball valve assembly, the first ball valve assembly is arranged in the first cavity, and the second ball valve assembly is arranged in the second cavity. And the second ball valve assembly is suitable for dividing the interior of the second cavity into a feeding cavity and a discharging cavity, when the second ball valve assembly is in an open state, the feeding cavity is suitable for being communicated with the discharging cavity to supply materials into the discharging cavity, and the first ball valve assembly is suitable for being communicated with the first cavity and the feeding cavity to supply materials into the feeding cavity when the first ball valve assembly is opened. The first ball valve assembly and the second ball valve assembly can be quickly opened and closed according to the pressure change in the first cavity and the second cavity so as to adapt to the reciprocating motion of the piston pump and form stable material output; and through the arrangement of the first ball valve assembly and the second ball valve assembly, the materials needing to be output can be completely discharged, so that stable discharging of the materials is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pumps, in particular to a material transfer structure of a piston pump and also to a continuous piston pump. Background Art

[0002] With the existing continuous piston pumps, glue supply is basically achieved through a set of piston extrusion, and glue replenishment is performed by reversing, which results in the glue discharge operation being unable to be carried out continuously, reducing the glue discharge efficiency, and the accuracy of the glue discharge amount cannot be kept consistent; in addition, during the reciprocating motion of the piston, it is necessary to set a switch valve in each cavity of the piston pump, and realize the continuous output of the material through the mutual cooperation between the switch valves. However, in the continuous discharge process, some materials are easily infiltrated into each switch valve during the opening and closing process, and the infiltrated part of the material usually cannot be effectively discharged, which may cause the discharge amount of the piston pump to be unstable during the discharge process. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, the utility model provides a piston pump material transfer structure for continuous metering equipment, which can achieve stable material discharge of the piston pump.

[0005] According to the utility model, a piston pump material transfer structure for continuous metering equipment is provided, which is used to promote the flow of materials between the first cavity and the second cavity of the piston pump, and includes a first ball valve assembly and a second ball valve assembly. The first ball valve assembly is arranged in the first cavity, and the second ball valve assembly is arranged in the second cavity, and the second ball valve assembly is suitable for separating the second cavity into a feed cavity and a discharge cavity. When the second ball valve assembly is in an open state, the feed cavity is suitable for being connected to the discharge cavity so as to be able to supply material to the discharge cavity. The first ball valve assembly is suitable for connecting the first cavity with the feed cavity so that when the first ball valve assembly is opened, the first cavity is suitable for supplying material to the feed cavity.

[0006] The beneficial effect of the utility model is that by respectively arranging the first ball valve assembly and the second ball valve assembly at the feed ports of the first cavity and the second cavity of the piston pump, the first ball valve assembly can be opened and closed when conveying materials into the first cavity to limit the conveying of materials, and the second ball valve assembly can be opened and closed when conveying materials from the first cavity to the second cavity to limit the input of materials, and the first ball valve assembly and the second ball valve assembly can be opened and closed quickly according to the changes in the pressure in the first cavity and the second cavity to adapt to the stable material output formed by the reciprocating motion of the piston pump; and the arrangement of the first ball valve assembly and the second ball valve assembly can completely exhaust the materials to be output, thereby ensuring stable material discharge.

[0007] Preferably, the first ball valve assembly comprises a first mounting seat, a feed bracket is arranged in the first mounting seat, a feed hole is opened on the feed bracket, and the feed hole is suitable for connecting the first cavity and the feed cavity.

[0008] Further preferably, the first ball valve assembly also includes a first sealing ball and a first elastic member, the first sealing ball is connected to one end of the first elastic member, the other end of the first elastic member is connected to the elastic member limiting groove extending from the first mounting seat, and the first elastic member is suitable for elastically supporting the first sealing ball so that the first sealing ball is suitable for blocking or opening the feed port of the first cavity.

[0009] Preferably, the elastic member limiting groove is suitable for connecting the first cavity and the feeding cavity.

[0010] Further preferably, a limiting step is provided on the circumferential side of the limiting groove of the elastic member, and the limiting step is suitable for abutting against the first sealing ball to limit the retraction stroke of the first sealing ball.

[0011] Preferably, the first mounting seat is provided with a sealing seat, and the inner side of the sealing seat is provided with a chamfer, and the chamfer is suitable for abutting against the spherical surface of the first sealing ball to tightly seal the feed port.

[0012] Further preferably, the second ball valve assembly includes a second mounting seat, a second sealing ball and a second elastic member arranged in the second mounting seat, one end of the second elastic member is connected to the second mounting seat, and the other end is connected to the second sealing ball, and the second elastic member is suitable for driving the second sealing ball to open or close the feed port of the second mounting seat.

[0013] Preferably, a first material discharge channel is formed on the side wall of the second mounting seat, and the second sealing ball is suitable for simultaneously blocking the first material discharge channel when closing the material reduction port of the second mounting seat.

[0014] Further preferably, second discharge channels are provided on both sides of the connection end between the elastic member and the second mounting seat, and the second discharge channels are suitable for being connected to the discharge cavity so that when the second sealing ball opens the feed port of the second mounting seat and retracts, the material retained between the sealing ball and the end of the second mounting seat can be squeezed out through the second discharge channel.

[0015] The utility model provides a continuous piston pump, which adopts the piston pump material transfer structure described in the utility model. The continuous piston pump includes a first cavity and a second cavity. The piston pump material transfer structure includes a first ball valve assembly and a second ball valve assembly. The first ball valve assembly is arranged at the feed port of the first cavity, and the second ball valve assembly is arranged at the feed port of the second cavity, so as to promote the flow of materials between the first cavity and the second cavity via the first ball valve assembly and the second ball valve assembly.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the internal structure of the piston pump material transfer structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the first ball valve assembly of the piston pump material transfer structure of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the second ball valve assembly of the piston pump material transfer structure of the utility model.

[0022] Reference numerals:

[0023] 1. The first cavity;

[0024] 2. Second cavity; 21. Feed cavity; 22. Discharge cavity;

[0025] 3. First ball valve assembly; 31. First mounting seat; 32. Feed bracket; 33. Feed hole; 34. First sealing ball; 35. First elastic member; 36. Elastic member limiting groove; 37. Limiting step; 38. Sealing seat;

[0026] 4. Second ball valve assembly; 41. Second mounting seat; 42. Second sealing ball; 43. Second elastic member; 44. First discharge channel; 45. Second discharge channel; 46. Limiting platform. DETAILED DESCRIPTION

[0027] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0028] In the description of the present invention, it should be understood that the terms "top", "bottom", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] A piston pump material transfer structure in a specific implementation manner of the utility model, the piston pump used in this application has a first cavity 1 and a second cavity 2, through which the material in the first cavity 1 and the second cavity 2 can be easily circulated to ensure that the piston pump can stably input and output materials.

[0030] See also Figure 1 The piston pump material transfer structure includes a first ball valve assembly 3 and a second ball valve assembly 4, wherein the first ball valve assembly 3 is arranged in the first cavity 1, and the second ball valve assembly 4 is arranged in the second cavity 2. The second ball valve assembly 4 can separate the internal space of the second cavity 2 into a feed cavity 21 and a discharge cavity 22, and when the second ball valve assembly 4 is in an open state, the feed cavity 21 and the discharge cavity 22 can be connected to realize the output of the material. When the second ball valve assembly 4 is in a closed state, the feeding path between the feed cavity 21 and the discharge cavity 22 is cut off. As the material in the feed cavity 21 continues to increase, the pressure of the material in the feed cavity 21 on the second ball valve assembly 4 continues to increase, and then the second ball valve assembly 4 can be lifted to move in the direction away from the piston pump feed port. At the same time, the volume of the feed cavity 21 increases and the volume of the discharge cavity 22 decreases. In addition, the first ball valve assembly 3 can connect the first cavity 1 with the feed cavity 21. When the first ball valve assembly 3 is opened, the first cavity 1 can feed material into the feed cavity 21 through the first ball valve assembly 3, thereby realizing stable material transportation. It should be noted that the first ball valve assembly 3 and the second ball valve assembly 4 are not opened at the same time when they are in the working state.

[0031] See also Figure 2The first ball valve assembly 3 includes a first mounting seat 31, a feed bracket 32 ​​is provided in the first mounting seat 31, a feed hole 33 is opened on the feed bracket 32, and the feed holes 33 are arranged circumferentially around the feed bracket 32. Through the setting of the feed hole 33, the material input into the first cavity 1 can flow from the feed hole 33 to the feed cavity 21, so as to realize the material transportation from the first cavity 1 to the feed cavity 21.

[0032] More specifically, the first ball valve assembly 3 also includes a first sealing ball 34 and a first elastic member 35, one end of the first elastic member 35 is connected to the first sealing ball 34, and the other end of the first elastic member 35 is connected to the elastic member limiting groove 36 extending from the first mounting seat 31. The setting of the first elastic member 35 can elastically support the production line of the first sealing ball 34, that is, it can drive the first sealing ball 34 to extend or retract axially in the piston pump, and when the first sealing ball 34 extends to the feed port of the first cavity 1, the first cavity 1 is blocked, and after the first sealing ball 34 retracts to a place away from the feed port of the first cavity 1, the feed port of the first cavity 1 is opened to facilitate the normal input of materials.

[0033] In addition, in the process of conveying materials into the feed chamber 21 through the first cavity 1, since there is always a gap between the side wall of the ball and the inner wall of the first mounting seat 31 after the first sealing ball 34 is opened, part of the material will flow into the space between the first sealing ball 34 and the first mounting seat 31 along the gap, and the elastic member limiting groove 36 is set to be connected to the feed chamber 21. At this time, the material flowing into the space between the first sealing ball 34 and the first mounting seat 31 is accumulated by the elastic member limiting groove 36, and then conveyed to the feed chamber 21 through the elastic member limiting groove 36, thereby realizing the complete conveying of the material in the first cavity 1 to the feed chamber 21.

[0034] Specifically, a limiting step 37 is provided around the elastic member limiting groove 36 , and the limiting step 37 extends toward the feed port of the first cavity 1 , so that the limiting step 37 can abut against the first sealing ball 34 , thereby limiting the retraction stroke of the first sealing ball 34 .

[0035] More specifically, a sealing seat 38 is provided on the first mounting seat 31, and a chamfer is provided on the inner side of the sealing seat 38. When the first sealing ball 34 blocks the feed port of the first cavity 1, the spherical surface of the first sealing ball 34 is in close contact with the chamfer of the sealing seat 38 to produce a sealing effect on the first cavity 1.

[0036] See also Figure 3The second ball valve assembly 4 includes a second mounting seat 41, a second sealing ball 42 and a second elastic member 43 arranged in the second mounting seat 41. One end of the second elastic member 43 is connected to the second mounting seat 41, and the other end is connected to the second sealing ball 42. The second elastic member 43 can drive the second sealing ball 42 to open or block the feed port of the second cavity 2. A first discharge channel 44 is provided on the side wall of the second mounting seat 41. When the second sealing ball 42 blocks the feed port of the second cavity 2, the second sealing ball 42 will simultaneously block the first discharge channel 44 provided on the side of the second mounting seat 41, so as to prevent trace materials from flowing into the internal space of the second mounting seat 41 and then flowing into the discharge cavity 22 through the first discharge channel 44, thereby affecting the discharge stability of the discharge cavity 22.

[0037] Specifically, the second discharge flow channel 45 is also provided on both sides of the connection end between the elastic member and the second mounting seat 41, and the second discharge flow channel 45 is suitable for communicating with the discharge cavity 22. When the second sealing ball 42 opens the feed port of the second cavity 2 and retracts, the second sealing ball 42 can be lifted to squeeze out the material retained between the second sealing ball 42 and the end of the second mounting seat 41 from the second discharge flow channel 45. In addition, the second sealing ball 42 cannot be lifted all the time, and a limit platform 46 is provided on the second mounting seat 41. The limit platform 46 can limit the lifting stroke of the second sealing ball 42, so as to avoid the second sealing ball 42 blocking the second discharge flow channel 45, thereby affecting the normal outflow of the material from the second discharge flow channel 45.

[0038] A continuous piston pump of the utility model adopts the piston pump material transfer structure described in any of the above embodiments of the utility model, and the continuous piston pump includes a first cavity 1 and a second cavity 2, and the piston pump material transfer structure includes a first ball valve assembly 3 and a second ball valve assembly 4. The first ball valve assembly 3 is arranged at the feed port of the first cavity 1, and the second ball valve assembly 4 is arranged at the feed port of the second cavity 2, so as to promote the flow of materials between the first cavity 1 and the second cavity 2 via the first ball valve assembly 3 and the second ball valve assembly 4.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or multiple embodiments or examples in a suitable manner.

[0040] The above description is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A piston pump material transfer structure, used to promote the flow of materials between a first cavity (1) and a second cavity (2) of a piston pump, characterized in that: The invention comprises a first ball valve assembly (3) and a second ball valve assembly (4), wherein the first ball valve assembly (3) is arranged in the first cavity (1), and the second ball valve assembly (4) is arranged in the second cavity (2), and the second ball valve assembly (4) is suitable for dividing the internal space of the second cavity (2) into a feed cavity (21) and a discharge cavity (22); when the second ball valve assembly (4) is in an open state, the feed cavity (21) is suitable for being connected to the discharge cavity (22) so as to be able to supply material into the discharge cavity (22); and the first ball valve assembly (3) is suitable for connecting the first cavity (1) with the feed cavity (21) so as to be able to supply material into the feed cavity (21) when the first ball valve assembly (3) is opened.

2. The piston pump material transfer structure according to claim 1, characterized in that: The first ball valve assembly (3) comprises a first mounting seat (31), a feed bracket (32) is arranged inside the first mounting seat (31), a feed hole (33) is opened on the feed bracket (32), and the feed hole (33) is suitable for connecting the first cavity (1) with the feed cavity (21).

3. The piston pump material transfer structure according to claim 2, characterized in that: The first ball valve assembly (3) further comprises a first sealing ball (34) and a first elastic member (35); the first sealing ball (34) is connected to one end of the first elastic member (35); the other end of the first elastic member (35) is connected to an elastic member limiting groove (36) extending from the first mounting seat (31); the first elastic member (35) is suitable for elastically supporting the first sealing ball (34) so ​​that the first sealing ball (34) is suitable for blocking or opening the feed port of the first cavity (1).

4. The piston pump material transfer structure according to claim 3, characterized in that: The elastic member limiting groove (36) is suitable for connecting the first cavity (1) and the feed cavity (21).

5. The piston pump material transfer structure according to claim 4, characterized in that: A limiting step (37) is provided on the peripheral side of the elastic member limiting groove (36), and the limiting step (37) is suitable for abutting against the first sealing ball (34) to limit the retraction stroke of the first sealing ball (34).

6. The piston pump material transfer structure according to claim 5, characterized in that: The first mounting seat (31) is provided with a sealing seat (38), and the inner side of the sealing seat (38) is provided with a chamfer, and the chamfer is suitable for abutting against the spherical surface of the first sealing ball (34) to tightly seal the feed port.

7. The piston pump material transfer structure according to claim 1, characterized in that: The second ball valve assembly (4) comprises a second mounting seat (41), a second sealing ball (42) and a second elastic member (43) arranged in the second mounting seat (41), one end of the second elastic member (43) is connected to the second mounting seat (41), and the other end is connected to the second sealing ball (42), and the second elastic member (43) is suitable for driving the second sealing ball (42) to open or block the feed port of the second cavity (2).

8. The piston pump material transfer structure according to claim 7, characterized in that: The side wall of the second mounting seat (41) is provided with a first discharge channel (44), and when the second sealing ball (42) is adapted to seal the feed port of the second cavity (2), it simultaneously seals the first discharge channel (44).

9. The piston pump material transfer structure according to claim 7, characterized in that: Second discharge channels (45) are provided on both sides of the connection end between the elastic member and the second mounting seat (41), and the second discharge channel (45) is suitable for being connected to the discharge cavity (22) so that when the second sealing ball (42) opens the feed port of the second cavity (2) and retracts, the material retained between the second sealing ball (42) and the end of the second mounting seat (41) can be squeezed out through the second discharge channel (45).

10. A continuous piston pump, characterized in that: A piston pump material transfer structure as described in any one of claims 1 to 9 is adopted, wherein the continuous piston pump comprises a first chamber (1) and a second chamber (2), and the piston pump material transfer structure comprises a first ball valve assembly (3) and a second ball valve assembly (4), wherein the first ball valve assembly (3) is arranged at a feed port of the first chamber (1), and the second ball valve assembly (4) is arranged at a feed port of the second chamber (2), so as to facilitate material flow between the first chamber (1) and the second chamber (2) via the first ball valve assembly (3) and the second ball valve assembly (4).

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